是否允许在链接中嵌套链接？

Straight from the W3C for HTML4:

12.2.2 Nested links are illegal

Links and anchors defined by the A element must not be nested; an A element must not contain any other A elements.

Since the DTD defines the LINK element to be empty, LINK elements may not be nested either.

HTML 5

And for HTML5 it is a little different.

You cannot have Interactive Content inside an A element. Interactive Content includes anchor tags.

I would restyle it so that it is more like this format:

<div class="sp_mngt_bar">
<h1><a href="#"<?php echo $v; ?></a></h1>
<a href="#" class="t_icons t_icons_settings sp_mngt_settings"></a>
<a href="#" class="t_icons t_icons_move sp_mngt_move"></a>
</a>

Nested links are illegal. To achieve the same behavior as with nested links you can do the following:

Use @mikevoermans HTML format as shown below and bind click event

<div class="sp_mngt_bar">
<h1><a href="#"<?php echo $v; ?></a></h1>
<a href="#" class="t_icons t_icons_settings sp_mngt_settings"></a>
<a href="#" class="t_icons t_icons_move sp_mngt_move"></a>
</div>

Your click event should look like this:

$(".sp_mngt_bar").bind("click", function(e) {
var target = $(e.target);
if(target.has('.t_icons_settings') { //Do something for settings }
else if(target.has('.t_icons_move') { //Do something for move }
else { //Do something for sp_mngt_bar
});

Although I totally agree with the selected answer and yes, you shouldn't have Interactive Content inside an A element, sometimes you may need a workaround to this.

Here's an example where you need to put an interactive element inside an A tag. That little close button on the top right.

Here's the HTML for this. (It's not the actual build, I made it a bit simpler)

    <a href="#">
<span class="hide">X</span> <!-- THIS IS THE SMALL 'X' WHICH HIDES THE WHOLE BOX -->
<img src="images/camera.svg" width="50" alt="Camera" />
<em>
Upload a profile picture
<small>
Here's the deal. Make your profile look awesome and even get 25 karma for it. We're not kidding.
</small>
</em>
<strong>
+ 25 K
</strong>
</a>

So, basically we want to hide this box when the user clicks on the 'X'. Otherwise, just it should work like a simple A tag. Here's the jQuery which did the trick.

    $('.hide').click(function(e) {
e.preventDefault();
e.stopPropagation(); // THIS IS THE KEY PART
    

// DO WHATEVER YOU WANT, I FADED OUT THE BOX FOR EXAMPLE
$(this).parent().fadeOut(300);
});

I hope this helps someone with the same problem. ;)

Wrap your nested link inside an object tag :

<a href="#" class="sp_mngt_bar">
<h1><?php echo $v; ?></h1>
<object><a href="#" class="t_icons t_icons_settings sp_mngt_settings"></a></object>
<object><a href="#" class="t_icons t_icons_move sp_mngt_move"></a></object>
</a>

To simply answer the question: No.

That being said, here's a pure html/css workaround:

https://codepen.io/pwkip/pen/oGMZjb

.block {
position:relative;
}


.block .overlay {
position:absolute;
left:0; top:0; bottom:0; right:0;
}


.block .inner {
position:relative;
pointer-events: none;
z-index: 1;
}


.block .inner a {
pointer-events: all;
}

<div class="block">
<a class="overlay" href="#overlay-link"></a>
<div class="inner">
This entire box is a hyperlink. (Kind of)<br><br><br><br>
<a href="#inner-link">I'm a W3C compliant hyperlink inside that box</a>
</div>
</div>

While technically not an answer to the question, another workaround is to bind the click event to a span or div:

<a href="outer-link">
Outer Link
<span class='inner-link'>Inner Link</span>
</a>


$('.inner-link').click(function (e) {
// Prevent the click-through to the underlying anchor
e.stopPropagation();


// Go to a link
window.location.href = 'page.html';
// Or call a javascript method
doSomething();


return false;
});

One solution is to position a link absolutely inside of the parent link container:

<div style="position: relative">
<a href="#">
<h1><a href="#"<?php echo $v; ?></a></h1>
<div id="placeholder" style="height: 24px">
</a>
<div style="position: absolute; bottom: 0">
<a href="#"></a>
</div>
</div>

@Jules answer, just shorter:

.parent {
position:relative;
}


.overlay-link {
position:absolute;
inset: 0;
}

html:

<div class="parent">
<a class="overlay-link" href="..."/>
<div class="child">
                    

</div>
</div>